Journal
OPTICS EXPRESS
Volume 18, Issue 15, Pages 16146-16155Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.016146
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We report on the design, simulation and experimental demonstration of a new type of waveguide crossing based on subwavelength gratings in silicon waveguides. We used 3D finite-difference time-domain simulations to minimize loss, crosstalk and polarization dependence. Measurement of fabricated devices show that our waveguide crossings have a loss as low as -0.023 dB/crossing, polarization dependent loss of < 0.02 dB and crosstalk <-40 dB. (C) 2010 Optical Society of America
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